Air-valve.



nomma To fzllwho'm it may concern."

Be it'liottm' thathlfAnnAN Ho'rTnxno'rii, a Subj ect' "of the KingY of.Saxony, Germany, residingfat Berlin, lany, have invented certain andusefuly `lmpro'ements in Air-Valves," 1ofA IWhicli the following is aspecificatio f yThe' presentinventionv relates to Valve` mechanism" andpartiulnarly to mechanism `of the rcheck ralye 't-ypeysuch as used inconnection with'vehiclettires for the purpose of enabling 'them lto`be`;i'1'iiiz`1ted.

'Considerablediiicultyf is experienced in producing an'elficientfaintight valve for use in"=conr`ection'Withftehicle tiresor'in similar'situ'ationsy and at the saine time a simple'and compat'tconstruction having but few parts'lwhich are/not* likely to get outoforder'and which" operate in a uniform manner *and* forv a'oniparatiyelylong period. lty is usual in the simplest forms .t-o`ernpllby' an'v ordinarybhecl; ralve With a l`rubber--packing;,kbtttthis is objectionable I buffy.

hielo'.

since, if the pressure -is `comparatively great, the valve is apt'tbefforced against its seat With sufficient pressure'tto cause it tostick andthe rubber packingjis caused to' rapidlydeteriiate-ineffectiveness.

Therobj'ect of th''pre'se'nt invention is to produce a simple andcompact vvalve of the character described "so farranged as to beeiv'icientin tope'ration of great dura- A ,furtinertlob e Vfoffthe'-character specialve proper is re- Aone of the improyed valve mechanismsar# ranged in positionupon the t-irexof the ve- Similar referencecharacters will be.' used throughout the specification and drawing toindicate like parts.` A indicates a-tire mounted upon a rim B,

'these parts being of course of any desired construction since they formno part of the present invention andsince, furthermore,

. the ,valve .mechanism may be employed Ject lfv the `presentinvent-ion- -is to produce. a va y tiedin'i'vhichpressure Iupon theyielding en# vgagin'g surfaces. of "jthe if' 'duced to a"A minimum. i

AIR-VALVE. f'

Spanair@ pf mais Pasa. i Q intrested Nov; 26, '1912.` :cation-meaDecember 23", 1o4."`s`e 'rii'No.:aaoea l equally Well in othersituations. The valve 55 prises two tubes 2 and I5, one or both of-60Vwhich consists of rubber or a similar. elastic material. these tubesbeing arranged one,l

Withinfthe othen One end lof the double tube. formed by the superimposedtubes Q and a is expanded upon a nipple Ll. and the ,65

other end of the tube extends-into the chamber 5 of the casing l. Thenipple 4 is cone! shaped, and together-With' the superimposed tubes,engages `With azcone-shaped socket G 1n the end of the casing: whereby,when the 70 parts are placed in position, the outer end of the doubletube is firmly held in place. The nipple t is provided with a shouider 7which engages with a nut 8 screw-threaded upon the casing li thisnutserving to main' 75 tain the partsin their operative positions. Hthinthe outer tube 2 there 1s arranged a plug 9 Which is preferably looseand provided Witha series of annular ribs l0. AThe diameter of theseribs is such that, 'when the so plug is in position, the tube 3 iscollapsed and forced against-one sideof th'e inclosmg ltube 2, as shown,and at the same time the coll-apsedtube and the Walls of the inclosingtubear'e corrugated. A passage or channel 85 l1 extends through thenipple and it is through this passage tiuid is introduced into thechamber 5- and thence into Athe tire. ln operation the cap is removedVfrom the end of the nipple and the pump or other source of compressediiuid supply is screwed or 'otherwise fastened to the nipple. The iuidpasses through the passage or channel ll int-(fthe doubleftube and,.when the pressure 'is sufficient-` causes the innertube 3 to open 95 yslightly to permit the passage of. the uid through the tube and out ofthe inner end thereof to the chamber 5.. When the presa` sure in thechannel l1 is reduced .the tube I immediately collapses to the positionshoWn,-.10Q

.either by reason of `its own elasticityl or by `reason of theelasticity-,of the inclosing-tube 2; thereby eifectually preventing thefluid from again leaving the chamber 5.

lt is not necessary that plug 9 be ribbed 105 as shown, but it ispreferably provided AWith, at least.. one rather narrow edge whichpermits the formation lof a'perfectly tight FFE I i 01111,. orV.'VBERLIN; ,y GERMANY, Assistme fro GENERAL i'i1.n`:tr.1t1o" COMPANY, ACORPORATION on NEW YonKf r closure in the collapsed tube Without theemployment of very much force, since the narrow edge produces a.corresponding bend in the tube.

By employing aseries of ribs or projections the inner tube is heldclosed at a number of points and consequently thel diameter of the plugmay beconsiderablyl reduced, thereby decreasing the pressure at any onepoint and avoiding the necessity of stretching the material of the tubesvery much. It is evident that the less the strain upon the tubes thelonger the lit'e thereof will be.

Although the fixed ends of the tubes 2 and 3 are illustrated as securedin place by means of a nipple 4;, it is of course evident that theparticular fastening means em. ployed may be greatly varied.

Furthermore. if desired, the free end of the tube may be provided with athickened portion or reinforcement 13, which prevents the plug :'29 frombeing accidentally discharged from the end .of the tube. Many othermodiiicaions mayllkewise be made Withoutdepart- .1215.' tion as setforth in the appended claims.

,ing from the spirit and scope of the invenmeans interposed between thetubesl for holding a portion of the inner tube normally collapsed andpressing it against the interior of the outer tube. i

. 3. A valve comprising a pair of elastic tubes arranged one `Within theother, and means for collapsing the inner tube against i *l the interiorof the outer tube.

4. A valve comprising a pair of tubes arranged one Within the other, theouter tube being elastic, and means .for collapsing the inner tubeagainst the interior of the outer tube.

5. A valve having in combination a tube,

an elastic inclosing tube, and means for collapsing the inner tubeagainst the inclosing tube.

6. A valve having in combination, a tube, an elastic inclosing tube, andmeans arranged between the Walls of the tube for collapsing the innertube against the interior of the inclosing tube.

7. A valve having in combination, a'tube, an elastic inclosing tube, andmeans for collapsing the inner tube against the interior of theil'iclosing tube and forming a bend in the collapsed inner tube at thepoint of engagement bet-Ween it and the inclosing tube.

8. A valve comprising a tube, an elastic inclosing tube, and meanscontained Within said inclosing'tube for collapsing the inner.

tube against the interiore-f lthe inclosing tube.

9. A valve comprising a tube, an elastic inclosing tube, andmeanscontained Within said inclosi'ng tube for collapsing the inner tubeagainst the inclosing tube and forming a bend in said inner tube and inthe'wall of the inclosing tube.

l0. A Valve comprising a pair of tubes arranged one Within the other anda plug located between the two tubes, the cross-sectional area of theplug,` together withthe cross-sectional area of the Walls of the innertube being equal t or greater than the interior crossl sectional area ofthe outer tube.

11. A valve comprising a pair of tubes arranged one Within the other anda plug located between the two tubes, said plug having a series ofprojections adapted when the plug is in posit-ion 'to collapse the'innertube and press it as a series of points against t-he outer tube. l

12. A valve comprising a pair of tubes loosely arranged Within the.outer tube and adapted to collapse the inner tube against the interiorof the outer tube.

13. A valve comprising a t'u-be, a member having a plurality oftransverse ribs` and means for collapsing said tube and forcing itagainst said ribs.

14. A valve comprising a tube, a member having a plurality of ribs, andmeans. for collapsing said tube and holding lt'yieldingly against saidmember with the ribs extending transversely of the tube. I l

In Witness whereof I have hereunto set my hand this sixth day ofDecember, 1904.

ALBA1\T HOTTENROTH. VVit-nesses HENRY HAsPER, WOLDEMAR HAUPT.

